The First-Principles Study of Electronic Structure of Fe/MgO/Fe Magnetic Tunnel Junctions Interface

In this work series of models were constructed in order to investigate the relationship between atomic and electronic structure and TMR property. Models with normal component interface of Fe/MgO/Fe magnetic tunnel junctions were calculated by first-principles discrete variational method (DVM) within the framework of local spin density functional theory. The SP and TMR ratio of Fe at interface of ferromagnetic layer as well as density of states are analyzed. Our research shows that the thickness of ferromagnetic layers effect much on electronic structure. The interface and surface Fe layers have different feature from that of interior.

Download Full-text

Magnetic and transport properties of Mn3−xGa/MgO/Mn3−xGa magnetic tunnel junctions: A first-principles study

Applied Physics Letters ◽

10.1063/1.3676195 ◽

2012 ◽

Vol 100 (2) ◽

pp. 022408 ◽

Cited By ~ 40

Author(s):

Zhaoqiang Bai ◽

Yongqing Cai ◽

Lei Shen ◽

Ming Yang ◽

Viloane Ko ◽

...

Keyword(s):

Transport Properties ◽

First Principles ◽

Tunnel Junctions ◽

Magnetic Tunnel Junctions ◽

First Principles Study

Download Full-text

First-principles study of MnAl for its application in MgO-based perpendicular magnetic tunnel junctions

Applied Physics Letters ◽

10.1063/1.4986449 ◽

2017 ◽

Vol 110 (25) ◽

pp. 252403 ◽

Cited By ~ 14

Author(s):

Xuan Zhang ◽

L. L. Tao ◽

Jia Zhang ◽

S. H. Liang ◽

Leina Jiang ◽

...

Keyword(s):

First Principles ◽

Tunnel Junctions ◽

Magnetic Tunnel Junctions ◽

First Principles Study

Download Full-text

First-principles Modeling of Co/SrTiO3/Co Magnetic Tunnel Junctions

MRS Proceedings ◽

10.1557/proc-690-f2.6 ◽

2001 ◽

Vol 690 ◽

Author(s):

I.I. Oleinik ◽

E.Y. Tsymbal ◽

D.G. Pettifor

Keyword(s):

Density Functional Theory ◽

Electronic Structure ◽

Magnetic Moment ◽

First Principles ◽

Exchange Coupling ◽

Density Functional ◽

Tunnel Junctions ◽

Magnetic Tunnel Junctions ◽

Functional Theory ◽

Atomic And Electronic Structure

ABSTRACTThe atomic and electronic structure of Co/SrTiO3/Co (001) magnetic tunnel junctions (MTJs) was investigated by first-principles density-functional theory. We considered different interface terminations and the most stable structure with the TiO2 termination has been identified based on energetics of adhesion. The electronic structure of the TiO2-erminated MTJ shows an exchange coupling between the interface Co and Ti atoms mediated by oxygen. This coupling induces the magnetic moment of 0.25 μB on the interface Ti atom, which is aligned antiparallel to the magnetic moment of the Co layer. We argue that this might cause the inversion of the spin polarization of tunneling across the SrTiO3 barrier that was found in recent experiments.

Download Full-text